Marine-engine stop and control valve.



n. COPELAND; MARINE ENGINE STOP AND CONTROL VALVE.

APPLICATION men SEPT-l6. 191a.

Patented Mar. 25, 1919.

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Ii-IDILEY COPELAND, OF WALLSEND, ENGLAND.

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To all whom it may concern:

Be it known that I, RIDLEY COPELAND, of Joan street, Wallsend-on-Tyne,in the county of Northumberland, England, subject of the King of GreatBritain and Ireland, have invented certain new and useful Improvementsin Or Relating to Marine-Engine Stop and Control Valves, of wihch thefollowing is a specification.

This invention relates to marine engine stop and control valves. Theobject of this invention is to provide an improved stop and controlvalve.

A stop and control valve made in accordance with this inventioncomprises a casing, in which is formed a cylinder closed at one end andopen to the casing at the other end, a piston adapted to work in saidcylinder, the piston rod of said piston forming the stem of the mainvalve which is adapted to close the open end of the cylinder, a steaminlet to said casing, a steam outlet from the cylinder to the engine,means for admitting steam from the casing to the back of the piston,means for shutting off the steam to the back of the piston, means formoving the main valve to open and close the open end of the cylinder,and means for keeping the valve in its closed position. Means areprovided for the steam to be admitted to the back of the piston by thelever or other means which operates the main valve, so that when saidlever or other means is moved from its closed position to anintermediate position, steam is admitted to the back of the piston,whereby the main valve is converted from a loaded valve into anequilibrium valve whereupon the main valve can then be moved to anydesired position with as much ease as an ordinary throttle valve and canbe closed rapidly by moving the lever or other means back to theintermediate position. A further return movement of the lever or othermeans shuts oil the steam to the back of the piston, whereupon the valvebecomes a loaded valve.

The drawing filed herewith is a diagram of one form of valve made inaccordance with this invention.

a is a casing provided with a cylinder 1) having a steam inlet a andsteam outlet cl. In the cylinder is a piston e. The piston rod 7 formsthe stem of a valve 9 adapted to close the open end of the cylinder 6.On the end of the cylinder 2) is a guide h. In the casing a is astufling box j through which I Specification of Letters Patent.

MARINE-ENGINE STOP AND CONTROL VALVE.

Patented Mar. 25, 1919.

Application filed September 16, 1918. Serial No. 254,199.

passes a spindle is loosely connected to the valve 9. The spindle 7c isadapted to be operated by a lever m through the link a and lever 0. Inthe casing a is a screwed rod p adapted to be operated by a handle 1" tobear on the spindle is to close the valve 9 on to the end of thecylinder b. Inthe side of the cylinder I) is a slide valve 3 adapted tobe operated by the lever m through the link 26. From the casing a steamis admitted by a pipe '0 to the back of the slide valve 8. The handle mis shown in three positions marked 1, 2 and 3, notches 4: and 5 in thesection 6 corresponding with the positions 1 and 2. The link 15 is shownin the three positions corresponding with the positions of the lever mby reference letters t, 2?, t the valve 8 being open in the positions 25and F. The back of the piston e is adapted to be put into connectionwith the main condenser through the pipe to when the slide valve closesthe port to admit steam.

In operation, assuming the parts to be in the closed position as shownin the drawing, the handle 1' is turned to draw the rod 1) away from thespindle 7a,- the lever m is moved from position 1 to the position 2,whereupon the valve 8 is opened and steam admitted to the back of thepiston e. The valve 9 is then in equilibrium, whereupon it can be easilyopened to any position between shut and. fully open by moving the handlem between the positions 2 and 3 and this opening can be regulated in themanner of a throttle valve to regulate the steam to the engine. Thevalve can be closed rapidly by moving the lever on from the positions 3to 2 and on moving it back to 1 the steam to the back of the piston e isshut oii and the valve g be- (5011168 a loaded valve. The valve can beheld in position and permanently shut by screwing the rod 1 to bear onthe spindle It. By setting the position of the screwed rod 0" the limitto which the main valve can be opened can be predetermined.

What I claim as my invention, to secure by Letters Patent, is:

A stop and control valve comprising a casing, a cylinder in said casing,said cylinder being closed at one end and open to the said casing at theother end, a valve adapted to close the said open end of the cylinder, apiston adapted to work in said cylinder, the piston rod of said pistonformin the stem of said valve, a steam inlet to said casing, a steamoutlet from the cylinder to the engine,

and desire means for admitting steam'from the casing the said slidevalve can" be opened and closed to the back of the piston, means forshutby the initial movement of said operating ting off the steam.tottheiback 'ofathei piston, lever the said valve being regulated by themeans for moving the said valve means fer secendai y mgvem ent Qf thesaid operating '15 5 keeping the valve in itclSe'd pesiticim sa'id leverWithoflhmdving-said slide valve.

means for moving the said valve comprising" In Witness whereof, I V havehereunte an .eperatingrlevei' and 'aii'link connection, signed my. name.and said means for admitting steamvtonthe .n v, v R I-DLEY COPELAND.back of the piston comprising a slide valve "Witnesses: 7

l0 and a links conneetio nawith the said perat-H H. NIXON,

ing lever, the. arrangement being-such that I .i ,EBNEST H. YATES.

Cofiies lofthis patent niay be ebtained for five eeiits each;byaddressixigflihe flo niziissiener;offi etents Washi ;1D-6 w

